Welcome aboard vehicle <license plate number>. I will be your captain. Our estimated time of arrival is ________.
For your safety and the comfort of others, please turn off all outside voices and keep your hands securely folded in your lap at all times. This vehicle is equipped with safety belts which should be worn across the shoulder and low on the hips at all times. The NO ARGUING sign will remain lighted for the duration of the trip.
Thank you for your attention. We will be _<destination> –bound shortly.